LOLIN S3

Development Board

Code name: LOLIN_S3

LOLIN S3 is a development board based on the ESP32S3 microcontroller using XTENSA architecture.

This board features a maximum CPU frequency of 240 MHz and 16MB flash memory.

About LOLIN S3

A development board by Wemos based on the ESP32-S3-WROOM-1, featuring dual USB-C ports and compatibility with MicroPython and Arduino.

Where to Buy LOLIN S3

Amazon.com Ships worldwide

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Amazon.de Ships to EU

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Prices are subject to change. We earn from qualifying purchases as an Amazon Associate.

Technical Specifications

Complete technical specification details for LOLIN S3

Connectivity

WiFi 802.11 b/g/n (2.4 GHz)

Bluetooth 5.0

BLE 5.0

Microcontroller

Model esp32s3

Clock Speed 240 MHz

Flash Size 16MB

Architecture xtensa

✨ Features & Pins

Digital IO 48

Analog Input 18

PWM 23

Interrupts 46

Quick Setup

Copy-paste configs for LOLIN S3 - auto‑generated from this board's exact hardware specs.

ESP32S3 240 MHz 16MB DIO Xtensa

In Arduino IDE 2 select Lolin S3 from the esp32 by Espressif package. In PlatformIO use board = esp32-s3-devkitm-1. ESP32S3 · 240 MHz · 16MB · DIO.

Tools menu settings

Board (select in Arduino IDE) Lolin S3

CPU Frequency 240 MHz

Flash Size 16MB

Flash Mode DIO

Upload Speed 921600

Architecture Xtensa

In Arduino IDE 2, open Boards Manager, search "esp32" by Espressif and install it. Then go to Tools → Board and select "Lolin S3" for the LOLIN S3.

platformio.ini


[env:lolin_s3]
platform  = espressif32
board     = esp32-s3-devkitm-1
framework = arduino

; Exact hardware config for LOLIN S3
board_build.mcu        = esp32s3
board_build.f_cpu      = 240000000L
board_build.flash_size = 16MB
board_build.flash_mode = dio
board_upload.flash_size = 16MB

The board value is a close generic match - check PlatformIO board registry for an exact fit.

esp32: block (YAML)


esp32:
  board: esp32-s3-devkitc-1
  framework:
    type: arduino   # or "esp-idf"

# LOLIN S3 - 240 MHz ESP32S3
# Flash: 16MB | USB: N/A

Paste into your device's .yaml. See ESPHome ESP32 docs for full options.

esptool.py - flash command


esptool.py \
  --chip esp32s3 \
  --baud 921600 \
  write_flash \
    --flash_mode dio \
    --flash_size 16MB \
    0x0 bootloader.bin \
    0x8000    partitions.bin \
    0xe000    boot_app0.bin \
    0x10000   firmware.bin

Install: pip install esptool - replace firmware.bin with your binary - bootloader at 0x0

LOLIN S3 Pinout Diagram

Complete pin reference for LOLIN S3

Useful Links

Datasheets and resources for LOLIN S3

ESP32S3 Datasheet

Microcontroller reference

Pin Mappings

Complete pinout and GPIO mapping for LOLIN S3

Digital I/O Pins

Interrupt Pins

Analog Inputs

PWM Pins

Pin	Analog	Touch	PWM	Other
1	A0	T1	PWM
2	A1	T2	PWM
3	A2	T3	PWM
4	A3	T4	PWM
5	A4	T5	PWM
6	A5	T6	PWM
7	A6	T7	PWM
8	A7	T8	PWM
9	A8	T9	PWM
10	A9	T10	PWM	SS
11	A10	T11	PWM	MOSI
12	A11	T12	PWM	SCK
13	A12	T13	PWM	MISO
14	A13	T14	PWM
15	A14		PWM
16	A15		PWM
17	A16		PWM
18	A17		PWM
38			PWM	LED_BUILTIN
41			PWM	SCL
42			PWM	SDA
43			PWM	TX
44			PWM	RX

Legend

A0 Analog input

T0 Touch sensor

PWM PWM capable

RX/TX Serial pins

LED Built-in LED

# Pin number

Default Tools & Configuration

Build and upload settings for LOLIN S3

Setting	Value
Bootloader tool	esptool_py
Uploader tool	esptool_py
Network uploader tool	esp_ota
Bootloader address	`0x0`
Flash mode	dio
Boot mode	qio
PSRAM type	opi
Maximum upload size	1280 KB (1310720 bytes)
Maximum data size	320 KB (327680 bytes)